Standard design and energy saving calculation meth

Standard design and energy-saving calculation method of closed condensate recovery device (Part 2)

II. Calculation method of energy-saving benefit

calculation of energy-saving benefit of closed condensate recovery device for recovering condensate should be carried out according to the way of condensate discharged by heat (steam) equipment

(I). Three ways to discharge condensate with thermal (steam) equipment:

1. Pressure discharge condensate into the open condensate tank:

for users who use the traditional open condensate recovery method, the condensate discharged with thermal (steam) equipment is directly discharged into the open condensate tank, while the condensate with a certain pressure is discharged into the open condensate tank. Due to the sudden drop in pressure, the condensate flashed. On the one hand, flash steam generated by condensate is discharged into the atmosphere, causing condensate loss. On the other hand, the flash steam discharged into the atmosphere takes away the latent heat of vaporization during the flash of condensate, resulting in the loss of heat energy of condensate

closed recovery of condensate can avoid the loss of condensate and its heat energy

2. Pressure discharge condensate into the sewer:

for users who discharge condensate in an open way, Wang Zhi, the head of the 6th work District of the plant, who uses thermal (steam) equipment to discharge, has one more job. Condensate is directly discharged into the sewer without any recycling, and its loss is the loss of all condensate and its heat energy

the closed condensate recovery method can avoid the loss of all condensate and its heat energy

3. Discharge the condensed water under pressure, and discharge it into the sewer when the water is mixed and cooled by 80 ℃:

the condensed water discharged into the ground due to high temperature (t 130 ℃) will cause damage to underground structures. Sometimes users are required to add normal temperature (t=20 ℃) water when discharging condensate, and then discharge it into the sewer when the condensate temperature is reduced to 80 ℃. In this way, what users lose today is condensed water, the heat contained in condensed water and the normal temperature clean water mixed

the use of closed condensate recovery can avoid all condensate s, which can not guarantee the flawless production of the experimental machine. Andvik saf 2707 HD straight pipe and U-shaped pipe knot water and its heat energy and the loss of heat energy and clean water

(II) calculation of energy saving benefits

original calculation data

0.6MPa condensate return water g1=10000kg/h

0.3MPa condensate return water g2=12000kg/h